Add libraries winmm and ws2_32 when building shared library on Windows.

BUG=261
Review URL: http://codereview.chromium.org/40217

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1439 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

SConstruct

@@ -132,7 +132,8 @@ V8_EXTRA_FLAGS = {
       'WARNINGFLAGS': ['/W3', '/WX', '/wd4355', '/wd4800']
     },
     'library:shared': {
-      'CPPDEFINES':   ['BUILDING_V8_SHARED']
+      'CPPDEFINES':   ['BUILDING_V8_SHARED'],
+      'LIBS': ['winmm', 'ws2_32']
     },
     'arch:arm': {
       'CPPDEFINES':   ['ARM'],